What this calculator answers
When should I reorder boxes, poly mailers, tape, labels, or void fill so I do not stock out during supplier lead time?
Formula
Reorder point = (average daily use × lead time in days) + safety stock.
Worked example
40 mailers per day, 10-day lead time, 200 safety stock → reorder at 600 mailers.
Limitations
Assumes steady demand. Not financial advice.
Related decisions
Usage dollars: packaging cost. Which SKUs: starter guide.